Ashton Kutcher to testify against 'serial killer' who allegedly murdered his former girlfriend

Ashton Kutcher is reportedly set to testify against an alleged 'serial killer', who has been accused of murdering his former girlfriend.

Alleged serial killer Michael Gargiulo, who has been nicknamed 'The Hollywood Ripper,' is facing trial for the murder of three women, one of whom is a former love interest of Ashton Kutcher, and the attempted murder of one woman.

On February 21, 2001, the body of Ashley Ellerin was discovered at her home in the Hollywood Hills. She had reportedly been stabbed 47 times.

According to CBS, 22-year-old Ellerin was set to go on a date with then 23-year-old Kutcher. It's believed that he arrived at her home at 10:45pm that night, but Ashley never answered the door. Upon looking in the window, it's reported that Kutcher saw, what he believed to be, 'spilled wine,' not realising he was looking at blood.

Ellerin's roommate Jennifer Disisto recalls finding her friend early the next morning, stating "I remember it like it was yesterday. I entered the house. And Ashley was laying across the two stairs - absolutely blue and covered in blood."

Court reporter Cathy Russon has been covering the trial, which is happening at the moment, stating that Gargiulo is currently standing trial for the southern California murders of Ashley Ellerin, as well as Maria Bruno and the attempted murder of Michelle Murphy. He has also been charged with the murder of Tricia Pacaccio.

#HollywoodRipper - Gargiulo is charged w/the 1993 murder of Tricia Pacaccio in Illinois. He will likely be extradited back to Illinois after this. This trial is for the southern California murders of Ashley Ellerin, Maria Bruno & attempted murder of Michelle Murphy